NDLI: Automatic frequency control in packet based OFDM systems

Content Provider	IEEE Xplore Digital Library
Author	Hyungu Hwang Daeho Kim
Copyright Year	2011
Description	Author affiliation: Mobile Telecommunication Research Division, Electronics and Telecommunications Research Institute, Daejeon, Korea (Hyungu Hwang; Daeho Kim)
Abstract	This paper presents automatic frequency control (AFC) algorithm in packet based wireless orthogonal frequency division multiplexing (OFDM) system such as 3G-LTE [1]. We first analyze the method of general AFC using cyclic prefix (CP) in OFDM systems. The analysis will show that the compensated frequency value is unstable and related with presence of packet. This instability of frequency control is generated by the variation of accuracy of estimation value that varies with presence of packet. We show how proposed algorithm reduces the instability of frequency control. Results of simulation show that proposed algorithm reduces the instability of compensated frequency and improve tracking performance considerably. In addition, proposed algorithm has good performance in fading channel. This is because proposed algorithm can detect deep fade region and exclude it from frequency control. As a result, proposed AFC algorithm improves stability and performance of frequency control by decision of packet presence. Especially, 16-QAM and 64-QAM modulation schemes for high data rate transmission are sensitive to frequency offset, therefore proposed AFC algorithm supports to keep high data rate system performance stable.
Starting Page	259
Ending Page	263
File Size	1190889
Page Count	5
File Format	PDF
ISBN	9781457703898
e-ISBN	9781457703904
DOI	10.1109/APCC.2011.6152815
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-10-02
Publisher Place	Malaysia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	OFDM Frequency estimation Frequency control Estimation Fading Signal to noise ratio Wireless communication packet communication auto frequency control CP CFO
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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